High frequency piezo-composite transducer array designed for ultrasound scanning applications

An, Ning; Ratsimandresy, L.; Mauchamp, P.; Dufait, R.; Flesch, Aimé; Lethiecq, Marc

doi:10.1109/ultsym.1996.584147

Cited by 24 publications

(11 citation statements)

References 5 publications

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“…These frequencies can have a range from 0.5 MHz to 50 MHz . The difficulties in machining PZT ceramics have led to maximum range of operations of <20 MHz for pure PZT; patterned ZnO and polymer films have been used to as high as 100 MHz; however, these materials do not possess the very high piezoelectric and/or favorable acoustic properties of PZT/polymer composites. In order to increase the maximum range of operations and obtain larger lateral resolution, linear and phased array transducers are used.…”

Section: Reviewmentioning

confidence: 99%

Dielectric and piezoelectric properties of PVDF/PZT composites: A review

Jain

Prashanth

Sharma

et al. 2015

Polymer Engineering & Sci

336

164

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Smart materials, which exhibit piezoelectricity, find an eclectic range of applications in the industry. The direct piezoelectric effect has been widely used in sensor design, and the inverse piezoelectric effect has been applied in actuator design. Ever since 1954, PZT and BaTiO 3 were widely used for sensor and actuator applications despite their toxicity, brittleness, inflexibility, etc. With the discovery of PVDF in 1969, followed by development of copolymers, a flexible, easy to process, nontoxic, high density alternate with high piezoelectric voltage coefficient was available. In the past 20 years, heterostructural materials like polymer ceramic composites, have received lot of attention, since these materials combine the excellent pyroelectric and piezoelectric properties of ceramics with the flexibility, processing facility, and strength of the polymers resulting in relatively high dielectric permittivity and breakdown strength, which are not attainable in a single phase piezoelectric material. The current review article is an attempt to provide a compendium of all the work carried out with reference to PVDF-PZT composites. The review article evaluates the effect of grain size, content and other factors under the purview of dielectric and piezoelectric properties while evaluating the sensitivity of the material for sensor application. POLYM. ENG. SCI., 55:1589-1616, 2015

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Section: Reviewmentioning

confidence: 99%

Dielectric and piezoelectric properties of PVDF/PZT composites: A review

Jain

Prashanth

Sharma

et al. 2015

Polymer Engineering & Sci

336

164

View full text Add to dashboard Cite

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“…In conventional piezoelectric transducer technology, the arrays are prepared from mechanical dicing or laser-dicing of a plate of transducer material so that the elements are separated physically (kerfed arrays). Previously, mechanically diced linear arrays with center frequencies up to 30 MHz have been reported [11], [12]. However, the pitch of these arrays was greater than 1/2 λ , which was too large to satisfy the criteria of phased-array design.…”

Section: Introductionmentioning

confidence: 99%

PMN-PT single-crystal high-frequency kerfless phased array

Chen

Cabrera-Munoz

Lam

et al. 2014

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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This paper reports the design, fabrication, and characterization of a miniature high-frequency kerfless phased array prepared from a PMN-PT single crystal for forward-looking intravascular or endoscopic imaging applications. After lapping down to around 40 μm, the PMN-PT material was utilized to fabricate 32-element kerfless phased arrays using micromachining techniques. The aperture size of the active area was only 1.0 × 1.0 mm. The measured results showed that the array had a center frequency of 40 MHz, a bandwidth of 34% at −6 dB with a polymer matching layer, and an insertion loss of 20 dB at the center frequency. Phantom images were acquired and compared with simulated images. The results suggest that the feasibility of developing a phased array mounted at the tip of a forward-looking intravascular catheter or endoscope. The fabricated array exhibits much higher sensitivity than PZT ceramic-based arrays and demonstrates that PMN-PT is well suited for this application.

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“…In applications, such type of interaction problems of different dimensional fields appears in the mathematical model of piezoelectric transducers. Further examples of similar models are related to phased array microphones, ultrasound equipment, inkjet droplet actuators, drug discovery, sonar transducers, bioimaging, immunochemistry, and acousto‐biotherapeutics .…”

Section: Introductionmentioning

confidence: 99%

Interaction of acoustic waves and piezoelectric structures

Chkadua

Natroshvili

2014

Math. Meth. Appl. Sci.

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In the paper, we investigate the basic transmission problems arising in the model of fluid-solid acoustic interaction when a piezo-ceramic elastic body ( C ) is embedded in an unbounded fluid domain ( ). The corresponding physical process is described by boundary-transmission problems for second order partial differential equations. In particular, in the bounded domain C , we have 4 4 dimensional matrix strongly elliptic second order partial differential equation, while in the unbounded complement domain , we have a scalar Helmholtz equation describing acoustic wave propagation. The physical kinematic and dynamic relations mathematically are described by appropriate boundary and transmission conditions. With the help of the potential method and theory of pseudodifferential equations, the uniqueness and existence theorems are proved in Sobolev-Slobodetskii spaces.

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High frequency piezo-composite transducer array designed for ultrasound scanning applications

Cited by 24 publications

References 5 publications

Dielectric and piezoelectric properties of PVDF/PZT composites: A review

Dielectric and piezoelectric properties of PVDF/PZT composites: A review

PMN-PT single-crystal high-frequency kerfless phased array

Interaction of acoustic waves and piezoelectric structures

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